const http = require('http')
const server = http.createServer()

server.on('request',(req, res) => {
  //1.获取请求的url地址
  const url = req.url
  //2.设置默认的响应内容为404 Not found
  let content = '<h1>404 Not found</h1>'
  //3.判断用户请求的是否为/或/index.html首页
  //4.判断用户请求的是否为/about.html关于页面
  if(url === '/' || url === '/index.html') {
    content = '<h1>首页</h1>'
  } else if (url === '/about.html') {
    content = '<h1>关于页面</h1>'
  }
  //5.设置Content-Type响应头，防止中文乱码
  res.setHeader('Content-Type', 'text/html; charset=utf-8')
  //6.使用res.end()把内容响应给客户端
  res.end(content)
})

server.listen(80,() => {
  console.log('server running at http://127.0.0.1')
})